package com.cycle.community.controller;

import com.cycle.community.constant.CommunityConstant;
import com.cycle.community.entity.User;
import com.cycle.community.service.UserService;
import com.cycle.community.util.CommunityUtil;
import com.cycle.community.util.RedisKeyUtil;
import com.google.code.kaptcha.Producer;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.*;

import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.Map;
import java.util.concurrent.TimeUnit;

/**
 * @author lenovo
 * @create 2022/8/12 12:27
 */
@Controller
public class LoginController implements CommunityConstant {

    private static final Logger logger = LoggerFactory.getLogger(LoginController.class);

    @Autowired
    private UserService userService;

    @Autowired
    private Producer kaptchaProducer;
    @Autowired
    private RedisTemplate redisTemplate;

    @Value("${server.servlet.context-path}")
    private String contextPath;

    @RequestMapping(path = "/register", method = RequestMethod.GET)
    public String getRegisterPage() {
        return "/site/register";
    }

    @RequestMapping(path = "/login", method = RequestMethod.GET)
    public String getLoginPage() {
        return "/site/login";
    }

    @RequestMapping(path = "/register", method = RequestMethod.POST)
    public String register(Model model, User user) {//SpringMVC自动注入，只要属性名匹配
        Map<String, Object> map = userService.register(user);
        if (map == null || map.isEmpty()) {
            //跳到首页，激活后才跳到登录
            model.addAttribute("msg", "注册成功，我们已经向您的邮箱发送了一封激活邮件，请尽快激活");
            model.addAttribute("target", "/index");
            return "/site/operate-result";
        } else {
            model.addAttribute("usernameMsg", map.get("usernameMsg"));
            model.addAttribute("passwordMsg", map.get("passwordMsg"));
            model.addAttribute("emailMsg", map.get("emailMsg"));
            return "/site/register";
        }
    }

    //激活
    @RequestMapping(path = "/activation/{userId}/{code}", method = RequestMethod.GET)
    public String activation(Model model, @PathVariable("userId") long userId, @PathVariable("code") String code) {
        int result = userService.activation(userId, code);
        if (result == ACTIVATION_SUCCESS) {
            model.addAttribute("msg", "激活成功，您的账号已经可以正常使用了");
            model.addAttribute("target", "/login");
        } else if (result == ACTIVATION_REPEAT) {
            model.addAttribute("msg", "无效操作，该账号已经激活过了！");
            model.addAttribute("target", "/index");
        } else {
            model.addAttribute("msg", "激活失败，您提供的激活码不正确！");
            model.addAttribute("target", "/index");
        }
        return "/site/operate-result";
    }

    //生成验证码，获取数据，输出一个图片，存到response
    @RequestMapping(path = "/kaptcha", method = RequestMethod.GET)
    public void getKaptcha(HttpServletResponse response/*, HttpSession session*/) {
        //生成验证码
        String text = kaptchaProducer.createText();
        //生成图片
        BufferedImage image = kaptchaProducer.createImage(text);
        //将验证码存入session
//        session.setAttribute("kaptcha", text);

        //重构
        // 验证码的归属
        String kaptchOwner = CommunityUtil.generateUUID();
        //发给客户端，Cookie
        Cookie cookie = new Cookie("kaptchOwner", kaptchOwner);
        cookie.setMaxAge(60);
        cookie.setPath(contextPath);
        response.addCookie(cookie);
        //将验证码存入Redis
        String redisKey = RedisKeyUtil.getKaptchaKey(kaptchOwner);
        //60秒失效
        redisTemplate.opsForValue().set(redisKey, text, 60, TimeUnit.SECONDS);


        try {
            //将图片输出给浏览器
            response.setContentType("image/png");//声明
            ServletOutputStream os = response.getOutputStream();
            ImageIO.write(image, "png", os);//springmvc会关
        } catch (IOException e) {
            logger.error("响应验证码失败： " + e.getMessage());
        }

    }

    //表单提交数据

    /**
     * 登录
     *
     * @param username   账户
     * @param password   密码
     * @param code       验证码
     * @param rememberme 是否勾选记住我
     * @param model      返回数据
     * @param session    之前生成的验证码
     * @param response   可以创建cookie
     * @return
     */
    @RequestMapping(path = "/login", method = RequestMethod.POST)
    public String login(String username, String password, String code,
                        boolean rememberme, Model model, /*HttpSession session,*/ HttpServletResponse response,
                        @CookieValue("kaptchOwner") String kaptchOwner) {
        //表现层判断验证码，业务层处理登录
//        String kaptcha = (String) session.getAttribute("kaptcha");

        //重构
        String kaptcha = null;
        //判断客户端key是否失效
        if (StringUtils.isNotBlank(kaptchOwner)) {
            String redisKey = RedisKeyUtil.getKaptchaKey(kaptchOwner);
            kaptcha = (String) redisTemplate.opsForValue().get(redisKey);
        }


        if (StringUtils.isBlank(kaptcha) || StringUtils.isBlank(code) || !kaptcha.equalsIgnoreCase(code)) {
            //验证码验证不正确
            model.addAttribute("codeMsg", "验证码不正确！");
            return "/site/login";
        }
        //验证码忽略大小写
        //检查账号，密码
        int expiredSeconds = rememberme ? REMEMBER_EXPIRED_SECONDS : DEFAULT_EXPIRED_SECONDS;
        Map<String, Object> map = userService.login(username, password, expiredSeconds);
        if (map.containsKey("ticket")) {
            Cookie cookie = new Cookie("ticket", map.get("ticket").toString());
            cookie.setPath(contextPath);//有效路径
            cookie.setMaxAge(expiredSeconds);
            response.addCookie(cookie);//发送给浏览器
            return "redirect:/index";
        } else {
            model.addAttribute("usernameMsg", map.get("usernameMsg"));//如果不存在，null不会有影响
            model.addAttribute("passwordMsg", map.get("passwordMsg"));
            return "/site/login";
        }
    }

    @RequestMapping(path = "/logout", method = RequestMethod.GET)
    public String logout(@CookieValue("ticket") String ticket) {
        userService.logout(ticket);
        SecurityContextHolder.clearContext();
        return "redirect:/login";
    }


}
